The subtraction principle of equality states that if the same number is added to both sides of an equation, the sides remain equal and the equation remains balanced.

Answer 1

Therefore, if we have an equation such as:

a + b = c

We can subtract the same number from both sides, and the equation will still be true:

(a + b) - b = c - b

a = c - b

This principle allows us to manipulate equations and solve for unknown variables by performing operations on both sides of the equation.